Density-functional theory of a two-dimensional charge-density-wave state in a strong magnetic field

1983 ◽  
Vol 28 (8) ◽  
pp. 4284-4287 ◽  
Author(s):  
C. S. Wang ◽  
D. R. Grempel ◽  
R. E. Prange
Keyword(s):  
Magnetic Field ◽  
Density Functional Theory ◽  
Charge Density ◽  
Strong Magnetic Field ◽  
Charge Density Wave ◽  
Density Functional ◽  
Density Wave ◽  
Two Dimensional ◽  
Wave State ◽  
Functional Theory

scholarly journals Interpretations of ground-state symmetry breaking and strong correlation in wavefunction and density functional theories

2021 ◽  
Vol 118 (4) ◽  
pp. e2017850118 ◽  
Author(s):  
John P. Perdew ◽  
Adrienn Ruzsinszky ◽  
Jianwei Sun ◽  
Niraj K. Nepal ◽  
Aaron D. Kaplan
Keyword(s):  
Density Functional Theory ◽  
Charge Density ◽  
Ground State ◽  
Charge Density Wave ◽  
Density Functional ◽  
Density Wave ◽  
Static Charge ◽  
Functional Theory ◽  
Correlation Kernel ◽  
Frequency Moments

Strong correlations within a symmetry-unbroken ground-state wavefunction can show up in approximate density functional theory as symmetry-broken spin densities or total densities, which are sometimes observable. They can arise from soft modes of fluctuations (sometimes collective excitations) such as spin-density or charge-density waves at nonzero wavevector. In this sense, an approximate density functional for exchange and correlation that breaks symmetry can be more revealing (albeit less accurate) than an exact functional that does not. The examples discussed here include the stretched H2 molecule, antiferromagnetic solids, and the static charge-density wave/Wigner crystal phase of a low-density jellium. Time-dependent density functional theory is used to show quantitatively that the static charge-density wave is a soft plasmon. More precisely, the frequency of a related density fluctuation drops to zero, as found from the frequency moments of the spectral function, calculated from a recent constraint-based wavevector- and frequency-dependent jellium exchange-correlation kernel.

High magnetic field studies of the charge density wave state of the quasi-two-dimensional conductor KMO6O17

2004 ◽  
Vol 346-347 ◽  
pp. 314-318 ◽  
Author(s):  
Jean Dumas ◽  
Hervé Guyot ◽  
Hafid Balaska ◽  
Jacques Marcus ◽  
David Vignolles ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Charge Density ◽  
High Magnetic Field ◽  
Charge Density Wave ◽  
Density Wave ◽  
Field Studies ◽  
Two Dimensional ◽  
Wave State

High field De Haas-van Alphen studies in the charge density wave state of the quasi two-dimensional monophosphate tungsten bronze P4W12O44

1997 ◽  
Vol 86 (1-3) ◽  
pp. 2133-2134 ◽  
Author(s):  
C. Le Touze ◽  
L.H. Nguyen ◽  
C. Schlenker ◽  
E. Steep ◽  
M. Greenblatt
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
High Field ◽  
Density Wave ◽  
Tungsten Bronze ◽  
Two Dimensional ◽  
Wave State
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